128436340 has 12 divisors (see below), whose sum is σ = 269716356. Its totient is φ = 51374528.

The previous prime is 128436323. The next prime is 128436353. The reversal of 128436340 is 43634821.

It can be written as a sum of positive squares in 2 ways, for example, as 86936976 + 41499364 = 9324^2 + 6442^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3210889 + ... + 3210928.

It is an arithmetic number, because the mean of its divisors is an integer number (22476363).

Almost surely, 2^128436340 is an apocalyptic number.

128436340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128436340 is an abundant number, since it is smaller than the sum of its proper divisors (141280016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128436340 is a wasteful number, since it uses less digits than its factorization.

128436340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6421826 (or 6421824 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 128436340 is about 11332.9757786735. The cubic root of 128436340 is about 504.5404308379.

The spelling of 128436340 in words is "one hundred twenty-eight million, four hundred thirty-six thousand, three hundred forty".